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kirill115 [55]
2 years ago
12

_Zn + _HCl _ZnCl2 +_H2 how many grams of HCl would react with 2.99 grams of Zn

Chemistry
1 answer:
SIZIF [17.4K]2 years ago
4 0
3.33grams. Since you have to balance the question there would be two mols of HCl for every mol of Zn. And when you convert to mols 2.99/65.38 and then multiply that by two and convert to grams again, so multiply it by 36.46
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write an activity to show the change in state and change in temperature during a chemical reaction(change)
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If a piece of charcoal is taken and set on fire it will evolve CO2 and heat. Charcoal is solid but carbon dioxide is gaseous. This is an example of change of state and evolve of heat during chemical reaction.
5 0
3 years ago
A steel cylinder of oxygen is being store in a room at 25.0 °C under a pressure of 1250 atm. What pressure would be exerted by t
Rudik [331]

Answer:

P₂ = 1312.88 atm

Explanation:

Given data:

Initial temperature = 25°C

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Final temperature = 40°C

Final pressure = ?

Solution:

Initial temperature = 25°C (25+273.15 = 298.15 K)

Final temperature = 40°C ( 40+273.15 = 313.15 k)

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1250 atm / 298.15 K = P₂/313.15 K

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P₂ = 1312.88 atm

6 0
3 years ago
According to Newton's third law of motion, for every action force, there is
Nonamiya [84]

Answer:

A. an equal and opposite reaction force

Explanation:

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7 0
3 years ago
The cost of painting the circular traffic sign shown below is $3.50 per square foot. How much, to the nearest dollar, will it co
KiRa [710]

The cost of painting the traffic sign of 7.065 square feet is approximately equal to 25 dollar.

<u>Explanation:</u>

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But as the cost is given in unit of feet, we have to convert the radius from inches to feet.

1 inches = 0.0833 feet

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So, the radius of the traffic sign will be approximately equal to 1.5 feet.

The area of the traffic sign will be \pi r^{2} = 3.14 \times 1.5 \times 1.5 = 7.065 square feet.

So, if the cost of painting 1 square feet of traffic sign is 3.50 dollar, then

cost of painting 7.065 square feet of traffic sign =  3.50 × 7.065 = 24.7 dollar.

Thus, the cost of painting the traffic sign of 7.065 square feet is approximately equal to 25 dollar.

8 0
3 years ago
Which term describes the degree to which an element attracts electrons? view available hint(s) which term describes the degree t
Tems11 [23]
Answer is: <span>electronegativity.
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4 0
2 years ago
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